Inventor · disambiguated record
Helmut G. Alt
Also filed as: ALT HELMUT · ALT HELMUT G
93 granted patents·13 pending applications·4,112 citations·filing 1991–2018
99Inventor score
Files withPHILLIPS PETROLEUM CO80SAUDI BASIC IND CORP3CONOCOPHILLIPS CO2CONOCOPHILLIPS COMPANY IP SERVICES GROUP2DOETTERL MATTHIAS2
Top patents by PatentIndex Score
106 records- 0199US5210352AFluorene compoundsPHILLIPS PETROLEUM CO·Filed 1991·Granted May 11, 1993·146 cites·8 claims
- 0298US5565592AVinly-substituted bridged metallocenesPHILLIPS PETROLEUM CO·Filed 1995·Granted Oct 15, 1996·171 cites·6 claims
- 0398US5498581AMethod for making and using a supported metallocene catalyst systemPHILLIPS PETROLEUM CO·Filed 1994·Granted Mar 12, 1996·219 cites·38 claims
- 0498US5436305AOrganometallic fluorenyl compounds, preparation, and usePHILLIPS PETROLEUM CO·Filed 1991·Granted Jul 25, 1995·213 cites·67 claims
- 0598US5420320AMethod for preparing cyclopentadienyl-type ligands and metallocene compoundsPHILLIPS PETROLEUM CO·Filed 1994·Granted May 30, 1995·116 cites·17 claims
- 0698US5399636AMetallocenes and processes therefor and therewithPHILLIPS PETROLEUM CO·Filed 1993·Granted Mar 21, 1995·243 cites·54 claims
- 0797US6458905B1Complexes of pyridldiimines with vanadium and other transition metals, and their use as olefin oligomerization and polymerization catalystsPHILLIPS PETROLEUM CO·Filed 2000·Granted Oct 1, 2002·74 cites·1 claims
- 0897US5668230AOlefin polymerizationPHILLIPS PETROLEUM CO·Filed 1996·Granted Sep 16, 1997·128 cites·18 claims
- 0997US5571880AOrganometallic fluorenyl compounds and use thereof in an alpha-olefin polymerization processPHILLIPS PETROLEUM CO·Filed 1994·Granted Nov 5, 1996·162 cites·22 claims
- 1097US5563284ACyclopentadienyl-type ligands, metallocenes, catalyst systems, preparation, and usePHILLIPS PETROLEUM CO·Filed 1994·Granted Oct 8, 1996·107 cites·9 claims
- 1197US5541272AHigh activity ethylene selective metallocenesPHILLIPS PETROLEUM CO·Filed 1994·Granted Jul 30, 1996·140 cites·19 claims
- 1297US5466766AMetallocenes and processes therefor and therewithPHILLIPS PETROLEUM CO·Filed 1993·Granted Nov 14, 1995·136 cites·29 claims
- 1397US5401817AOlefin polymerization using silyl-bridged metallocenesPHILLIPS PETROLEUM CO·Filed 1993·Granted Mar 28, 1995·146 cites·14 claims
- 1497US5191132ACyclopentadiene type compounds and method for makingPHILLIPS PETROLEUM CO·Filed 1991·Granted Mar 2, 1993·147 cites·41 claims
- 1596US6509427B1Metallocenes, polymerization catalyst systems, their preparation, and usePHILLIPS PETROLEUM CO·Filed 2000·Granted Jan 21, 2003·75 cites·14 claims
- 1696US5770755AProcess to prepare polymeric metallocenesPHILLIPS PETROLEUM CO·Filed 1994·Granted Jun 23, 1998·73 cites·20 claims
- 1796US5654454AMetallocene preparation and usePHILLIPS PETROLEUM CO·Filed 1995·Granted Aug 5, 1997·119 cites·11 claims
- 1896US5631203AMetallocene compounds and preparation thereof containing terminal alkynesPHILLIPS PETROLEUM CO·Filed 1995·Granted May 20, 1997·111 cites·15 claims
- 1996US5631335AProcess of polymerizing olefins using diphenylsilyl or dimethyl tin bridged 1-methyl fluorenyl metallocenesPHILLIPS PETROLEUM CO·Filed 1993·Granted May 20, 1997·116 cites·15 claims
- 2096US5554795AProcess for preparing cyclopentadienyl-type ligandsPHILLIPS PETROLEUM CO·Filed 1995·Granted Sep 10, 1996·108 cites·8 claims
- 2196US5451649AOrganometallic fluorenyl compounds, preparation, and usePHILLIPS PETROLEUM CO·Filed 1994·Granted Sep 19, 1995·144 cites·38 claims
- 2295US5710224AMethod for producing polymer of ethylenePHILLIPS PETROLEUM CO·Filed 1995·Granted Jan 20, 1998·117 cites·25 claims
- 2394US5473020APolymer bound ligands, polymer bound metallocenes, catalyst systems, preparation, and usePHILLIPS PETROLEUM CO·Filed 1994·Granted Dec 5, 1995·63 cites·7 claims
- 2493US5492975APolymer bound metallocenesPHILLIPS PETROLEUM CO·Filed 1995·Granted Feb 20, 1996·60 cites·7 claims
- 2590US6187880B1Process for producing an olefin polymer using a metallocenePHILLIPS PETROLEUM CO·Filed 1999·Granted Feb 13, 2001·58 cites·8 claims
- 2690US5780659ASubstituted indenyl unbridged metallocenesPHILLIPS PETROLEUM CO·Filed 1996·Granted Jul 14, 1998·49 cites·10 claims
- 2788US5886202ABridged fluorenyl/indenyl metallocenes and the use thereofFiled 1997·Granted Mar 23, 1999·61 cites·36 claims
- 2888US5627247AOrganometallic fluorenyl compounds and use thereof in olefin polymerizationPHILLIPS PETROLEUM CO·Filed 1995·Granted May 6, 1997·60 cites·48 claims
- 2988US5492985APolymerization processesPHILLIPS PETROLEUM CO·Filed 1995·Granted Feb 20, 1996·42 cites·5 claims
- 3086US6482905B1Unsymmetric unbridged bis-indenyl metallocenes and their usePHILLIPS PETROLEUM CO·Filed 2000·Granted Nov 19, 2002·21 cites·19 claims
- 3186US5459218ASyndiotactic polypropylene prepared using silyl bridged metallocenesPHILLIPS PETROLEUM CO·Filed 1994·Granted Oct 17, 1995·18 cites·10 claims
- 3285US5705578AMethod for making and using a supported metallocene catalyst systemPHILLIPS PETROLEUM CO·Filed 1995·Granted Jan 6, 1998·89 cites·30 claims
- 3384US6262201B1Aryl substituted metallocene catalysts and their usePHILLIPS PETROLEUM CO·Filed 1999·Granted Jul 17, 2001·38 cites·19 claims
- 3484US5932670APolymerization catalysts and processes thereforPHILLIPS PETROLEUM CO·Filed 1998·Granted Aug 3, 1999·24 cites·23 claims
- 3584US5406013ACyclopentadiene type compounds and method for makingPHILLIPS PETROLEUM CO·Filed 1993·Granted Apr 11, 1995·17 cites·23 claims
- 3681US9000200B2Process for the preparation of metallocene complexesSAUDI BASIC IND CORP·Filed 2012·Granted Apr 7, 2015·4 cites·12 claims
- 3780US5726264AProcesses to produce metallocene compounds and polymerization processes therewithPHILLIPS PETROLEUM CO·Filed 1996·Granted Mar 10, 1998·24 cites·10 claims
- 3879US6153716APolyethylenes containing a unique distribution of short chain branchingPHILLIPS PETROLEUM CO·Filed 1998·Granted Nov 28, 2000·35 cites·36 claims
- 3974US7230128B2Organometallic fluorenyl compounds, preparations, and usePHILLIPS POTROLEUM COMPANY·Filed 2002·Granted Jun 12, 2007·11 cites·28 claims
- 4074US5610247AUnbridged metallocenes of 9-substituted fluorenyl compounds and use thereofPHILLIPS PETROLEUM CO·Filed 1995·Granted Mar 11, 1997·38 cites·36 claims
- 4173US5637744ABis fluorenyl metallocenes and use thereofPHILLIPS PETROLEUM CO·Filed 1995·Granted Jun 10, 1997·11 cites·5 claims
- 4272US5854363A(Omega-alkenyl) (cyclopentacarbyl) metallocene compoundsPHILLIPS PETROLEUM CO·Filed 1997·Granted Dec 29, 1998·41 cites·40 claims
- 4371US5492974AProcess for preparing polymer bound metallocenesPHILLIPS PETROLEUM CO·Filed 1995·Granted Feb 20, 1996·16 cites·10 claims
- 4470US6159888APolymerization catalyst systems, their preparation, and usePHILLIPS PETROLEUM CO·Filed 1998·Granted Dec 12, 2000·23 cites·19 claims
- 4570US5492973APolymer bound ligandsPHILLIPS PETROLEUM CO·Filed 1995·Granted Feb 20, 1996·15 cites·7 claims
- 4668US5541351ACyclopentadiene type compounds and method for makingPHILLIPS PETROLEUM CO·Filed 1994·Granted Jul 30, 1996·7 cites·4 claims
- 4766US5670589AOrganoaluminoxy product, catalyst systems, preparation, and usePHILLIPS PETROLEUM CO·Filed 1995·Granted Sep 23, 1997·21 cites·33 claims
- 4865US6340651B1Multicyclic metallocycle metallocenes and their usePHILLIPS PETROLEUM CO·Filed 1999·Granted Jan 22, 2002·27 cites·10 claims
- 4965US6162884AOlefin oligomerization and processes thereofPHILLIPS PETROLEUM CO·Filed 1999·Granted Dec 19, 2000·8 cites·15 claims
- 5065US5616752AMetallocenes and processes therefor and therewithPHILLIPS PETROLEUM CO·Filed 1995·Granted Apr 1, 1997·15 cites·8 claims
Showing the top 50 of 106 patent records by PatentIndex Score.
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